Patent · US Expired

Diffraction grating beam splitter in a laser resonator length control

US4547664A · kind A · utility

12Cited by

5References

5Claims

0Family size

Assignee

Carl Zeiss Stiftung · DE

Inventors

Peter Vogt · Wien, AT
Horst Kunzmann · Braunschweig, DE

Key dates

Filing date	Mar 31, 1983
Grant date	Oct 15, 1985
Priority date	—
Expiry date	Mar 31, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH01S3/139
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention contemplates a beam splitter which consists of a phase grating (5) which transmits at zero order the greatest part of the radiation of a two-mode laser (1) and which diffracts a relatively small part of the radiation, symmetrically at 1 order and -1 order, respectively. The intensity of components of the radiation polarized perpendicular to each other and associated with the two modes is measured by detectors (11, 12) in front of which polarization sheets (9, 10) are arranged as analyzers, and outputs of the detectors are used to regulate the center frequency of the laser tube (1).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.